package com.yx.common.utils;

import com.yx.common.exception.RRException;
import com.yx.system.entity.SysUser;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.session.Session;
import org.apache.shiro.subject.Subject;

/** shiro工具类
 * Created by wuye on 2017/11/24.
 */
public class ShiroUtils {

    public static Session getSession() {
        return SecurityUtils.getSubject().getSession();
    }

    public static Subject getSubject() {
        return SecurityUtils.getSubject();
    }

    public static SysUser getUser() {
        return (SysUser) SecurityUtils.getSubject().getPrincipal();
    }

    public static Long getUserId() {
        return getUser().getUserId();
    }

    public static void setSessionAttribute(Object key, Object value) {
        getSession().setAttribute(key, value);
    }

    public static Object getSessionAttribute(Object key) {
        return getSession().getAttribute(key);
    }

    public static boolean isLogin() {
        return SecurityUtils.getSubject().getPrincipal() != null;
    }

    public static void logout() {
        SecurityUtils.getSubject().logout();
    }

    public static String getKaptcha(String key) {
        Object kaptcha = getSessionAttribute(key);
        if(kaptcha == null){
            throw new RRException("验证码已失效");
        }
        getSession().removeAttribute(key);
        return kaptcha.toString();
    }

}
